<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>012-HTML5-Canvas-图像</title>
</head>

<body>
    <p>Image to use:</p>
    <img id="scream" src="./images/img_the_scream.jpg" alt="The Scream" width="220" height="277">
    <p>Canvas:</p>
    <canvas id="myCanvas" width="250" height="300" style="border:1px solid #d3d3d3;">
        您的浏览器不支持 HTML5 canvas 标签。</canvas>

    <script>

        var c = document.getElementById("myCanvas");
        var ctx = c.getContext("2d");
        var img = document.getElementById("scream");

        img.onload = function () {
            ctx.drawImage(img, 10, 10); // 把一幅图像放置到画布上 drawImage(image,x,y)
        } 
    </script>
</body>

</html>